Perhaps you should try some spelling variations:
nhanh thanh » phan thanh, nhanh tinh
thanh tung » thanh cong
cong nhanh » cong thanh, cong nhan, cong khanh
hoc thieu » toc thieu, hoc hien
doc hieu » toc thieu, hoc hien
ban cong » bang cong, van cong, phan cong
thanh tu » hanh tu, nhanh tu, thanh thuy
tung va » trung va, tuong va, dung va
va ban » van ban, va bai, va bao

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((doc hieu) or (hoc thieu)) xanh - thanh tung va ban cong nhanh thanh tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc hieu) OR (hoc thieu)) xanh - thanh tung va ban cong nhanh thanh tu.
• Adding a wildcard symbol may retrieve word variants: ((doc hieu) or (hoc thieu)) xanh - thanh tung va ban cong nhanh thanh tu*.